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loris [4]
3 years ago
9

Please help with all, I’ll mark brainliest as long as you tell me how you got that answer.

Mathematics
1 answer:
Mumz [18]3 years ago
7 0

Answer:

function= 2nd,6th

not a function=1st,3rd,4th,5th

Step-by-step explanation:

because in graphing a function, there should only be one y for the x. 2 or more y's in one x is considered as not a function

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There are 168 seats in 8 rows of the movie theater. How many seats would there be in 5 rows if the ratio of seats to rows remain
marshall27 [118]

Step-by-step explanation:

The ratio will be 21:1

Then seats in 5 rows be x:5

<h2>Therefore,</h2>

21 \times 5

= 105 seats

3 0
4 years ago
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evan plans to put half of the money in his savings account spend 1/5 on bubble to share with his friends and buy comic books wit
riadik2000 [5.3K]
Four out of five will go to the comic books
6 0
4 years ago
Help please!!! Thank you
dybincka [34]

Answer:

B: 54

Step-by-step explanation:

for the first digit: 1 or 3 (2 choices)

for the second digit: 0, 1, or 3 (3 choices)

for the third digit: 0, 1, or 3 (3 choices)

for the forth digit: 0, 1, or 3 (3 choices)

2×3×3×3=54

4 0
4 years ago
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Complete the square to determine the minimum or maximum value of the function defined by the expression. −x2 + 18x − 99
Leya [2.2K]
Given the expression:
-x^2+18x-99
to solve by completing squares we proceed as follows:
-x^2+18x-99=0
this can be written as:
-x^2+18x=99
x^2-18x=-99.......i
but
c=(-b/2)²
Hence:
c=(-(-18)/2)²=81
adding 81 in both sides of i we get:
x^2-18x+81=-99+81
factorizing the quadratic we obtain:
(x-9)(x-9)=-18
thus
(x-9)²+18=0
the above takes the vertex form of :
y=(x-k)²+h
where (k,x) is the vertex:
the vertex of our expression is:
(9,18)
hence the maximum point is at (9,18)
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6 0
3 years ago
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Which pair of equations below represent parallel lines? and y = 9 and x = 18 y = 4x + 9 and y = 4x – 9 y = 5x + 15 and y = –5x +
Inessa05 [86]

Answer:

The correct option is 2.

Step-by-step explanation:

The slope of two parallel lines are equal.

The slope intercept form of a line is

y=mx+b

Where, m is slope and b is y-intercept.

In option 1, the equation of lines are

y=9

x=18

The first line is a horizontal line and the second line is a vertical line. Therefore they are not parallel line. Option 1 is incorrect.

In option 2, the equation of lines are

y=4x+9

y=4x-9

By using the slope intercept form of a line, the slope of first line is 4 and the slope of second line is 4.

Since the slope of both lines are same, therefore both lines are parallel. Option 2 is correct.

In option 2, the equation of lines are

y=5x+15

y=-5x+15

By using the slope intercept form of a line, the slope of first line is 5 and the slope of second line is -5.

Since the slope of both lines are not same, therefore both lines are not parallel. Option 3 is incorrect.

3 0
3 years ago
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